Korloy SPMT040204-PD PC3500 Square Milling & U-Drill Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy SPMT040204-PD PC3500 is a high-precision Square Indexable Insert widely used for U-Drills (Indexable Drills) and small-diameter milling cutters. The PC3500 Grade is a specialized CVD-coated carbide designed for high-efficiency machining of Carbon Steel and Alloy Steel. Featuring a robust 0.4mm corner radius and a specialized "PD" chipbreaker, this insert ensures excellent chip evacuation and edge stability during high-speed hole making and facing operations.
High-Speed Steel Specialist: PC3500 is engineered for productivity. Its thick CVD coating acts as a thermal barrier, allowing you to push higher cutting speeds (Vc) without compromising the integrity of the cutting edge.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | SPMT040204-PD |
| Corner Radius (r) | 0.4 mm |
| Grade | PC3500 (High-Speed CVD for Steel) |
| Primary Application | U-Drill Outboard Edge / Small Milling |
Core Performance Benefits:
- Optimized for Steel: Specifically formulated for P-group materials (1045, 4140, etc.), providing superior resistance to crater wear.
- CVD Multi-Layer Coating: The TiCN+Al2O3+TiN layers ensure the insert can withstand the intense heat of continuous drilling.
- PD Chipbreaker: Designed for smooth chip curling in confined spaces like drill flutes, reducing the risk of chip jamming.
- Cost-Efficient: Four usable cutting edges per insert provide excellent value for high-volume production.
Recommended Cutting Parameters:
| Workpiece Material | Cutting Speed (Vc) | Feed per Tooth (fz/fn) |
|---|---|---|
| Carbon Steel (HB180-280) | 150 - 280 m/min | 0.05 - 0.12 mm/rev |
| Alloy Steel (HB280-350) | 120 - 220 m/min | 0.04 - 0.10 mm/rev |
| Pre-hardened Steel | 80 - 150 m/min | 0.03 - 0.08 mm/rev |
Compatible Tooling Systems:
This insert is designed to fit standard SPMT-pocketed tools:
- Indexable U-Drills: King Drill (12mm-14mm range)
- Small Face Mills: SPMT Type Milling Cutters
Machinist Tip: PC3500 vs. PC5300
Choosing the right grade for your SPMT040204 inserts:
Best for Speed. A CVD grade that thrives in high-heat, high-speed steel machining. Ideal for long production runs where cycle time is the priority.
Best for Versatility. Use this for stainless steel or when cutting speeds are lower and toughness is more important than pure wear resistance.
Pro Advice: When used in a U-drill, PC3500 is typically used on the outer pocket. The outer insert covers more surface area and moves at a higher peripheral speed, where the CVD coating's heat resistance is most effective.
Packaging: 10 pieces per box.
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Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.